robinson



@uitrit tstw getest @ffice O. H. P. ROBINSON, OF BELLIOR'I, NEW YORK, ASSIGNOR TO HIMSELF AND JOHN B. ROBINSON, OF SAME PLACE.

Letters Patent No. 70,901, elated November 12, 1867.

IMPROVEMENT IN GARPENTERS SQUARES.

t-luie .z'tgehule refrml in in time fletters ment anh mailing gmt t tige time,

'IO ALL WHOMXIT MAY CONCERN:

Be it known that I, O.'II. I?. ROBINSON, of'V Bellport, in the county of Suolk, and State of New York, have invented 'a new and useful Improvement in (.`}a.rpeiite1s Square and I do hereby declare that the following is a. full, clear, and exact description thereof, whichv will enable those skilledin the art to make and use the same, reference being had to the accompanying drawings., forming part of this specification, in which the drawing represents a square having my improvement.

Similar letters of reference indicate corresponding parts'. The object of this invention is to enable carpenters and buildersfto lay out themortises iu framing hou ses with dispatch and accuracy; and it consists in making az' slot in themain bar of the square for scrihing the motise directly .within it, instead of measuring and scribing on the 'outer' sides of the square in the ordinary manner.

A represents'the main bar and B the tongue or side bar of a earpenters square. In the main bar I cut `n. slot, a, having parallel sides and ends adapted in size to the ordinary in :ortises made in timber for housetraming, within which slot the mortise may be directly and accurately marked out with a scribe. In the tongue B a. slot, c, of different size may be made if desired; but one slot in the main bai'1W1-11 begeuerally found suiieient-l Having described my invention, I claim as new, and desire to secure by Letters Patent-4 A carpen'ters square provided with a. slot, a, -in the manner and for the purpose described.

0. H. P. ROBINSON.

Witnesses:

GEORGE WEIDNER, JOHN' WsInNER. 

